Switchboard-signal.



0. M. LEICH.

SWITUHBOARD SIGNAL.

APPLIUATxoN ruw JULY ze, 1907.

INH y IN INVENTQR y [n/v E* 6. M.

Patented Apr. 20, 1909.

various positions to readily facilitate the adjustment just described and yet such arm should possess sufficient rigidity to remain in any particular adjustment given it. The

armature t has folded about it as indicated, a non-magnetic strip of metal t3 which serves to prevent the armature t from sticking to the magnet t when attracted thereby. This non-magnetic stri t3 extends between the armature t1 and the arm n and has formed therein as indicated, an opening from which the rejecting toeigue t* is pressed, such opening ein ada t to engage the arm e* ca rried by t e ate v when the indicator is in its conceale position. The plate v is secured to a shutter v pivoted at p in the plate a, such shutter having a rearwardly extending curved arm o* about which a thin indicator v is secured as indicated. A shield r secured to the upper surface of ,the plate a, and having openings therein, is provided in order to rotect the indicator and shutter from acci ental injury. The openinvs i'a are closed by a transparent screen -rl llield in place by a curved strip ri similar in cpnformation to the inside surface of the shield i'. From this it will be seen that the shield just described constitutes a perfect protection for the shutter and indicator while at the same time permitting such indicator to be readily seen when the shutter is released from the armature by the attraction of the electromagnet, for which condition the action of giil'avity moves such shutter and indicator to t e position indicated in Fig. 3. In this position the arm o* enges a contact w supported and insulated m the under side of the plate a by a bracket wx as indicated, whereby any suitable night alarm or similar circuit may be closed to call the operators attention to the fact that the Vindicator and shutter have been released and'that suc-l1 indicator is in the dis layed position. The bracket d* has fo t ereon two curved arms d conformed to support at their outer ends the ivots l of lever k, which lever is conform lat its eft hand end to be engaged by the stoppinfcarried b thecam b w en the handle c is moved to e rightJ wherebyr the right hand end of such lever k is brought into engagement with a suitable cam surface on the plate v, as a result of whichthe -indicator 'v1 and shutter 'u are moved around to the 4right and the bar v* is brought into engagement with the opening abovedescribed in the strip t'. Thetonguelt serves to-prevent the shutter v andfindcatOr/v moved too far around tti-fthe' h tfj The pivots p* yas shown in,` Figylare armed nmaar@ levert-1:'. l

As a result of the construction above dcscribed it will be seen that when the electromagnett is energized in any suitable manner not shown, and the armature t' is attracted thereby, the shutter 'v and indicator c* ca rricd thereby nre released and such indicator nssumes a osition behind the openings 1* whereby tie operator ieaililv observes the saine. It is preferable, though not necessary, to color or mark the outer surface of the indicator if* in contrast with the appearance of the parts throuh the openings i" when the shutter and indicator are in their normaler engaged osition.

After t e o erator has observed the signal resented as escribed above, the shutter and indicator may be moved to their engaged position either during the regular operation of the handle c or by a special inoveinent of such handle to the iight as the case may be.

In the s ecifications and drawings just de scribed I ave shown my invent-ion as embodied in a standard ringing and listen' v key combined with a drop signal controller by a vertical electromagnet. Obviously, without departing from the'spirit of my invention, I ma make use of this key and signal for an oter desired purpose in which it is desir-ab e to effect circuit changes in res onse to a signal used to call for such Wt I claim is:

l, In a switchboard signal, in combina.- tion with an operators key, an electromagnet and an armature adapted to be attracted thereby, an indicator adapted to occupy either a displayed or a concealed position, means carried by such armature for hold such indicator in a. concealed position an means actuated by such operators ke for movin such indicator from a displayedY to a conce edposition. A

2. In a switchboard signal, in combination with an operator' s key, a vertically disposed electromagnet and an armature adapt- 1 10 ed to be attracted thereby, an indicator adapted to occupy either a displayed or a concealed position, means carried by such armature for holding such indicator in a concealed position and means actuated b such 115 operatorie .key for moving such in 'cater from a displayed to a concealed position.

3. In a switchboard signal, in combination with an operators key, a verticali disposed electromagnet and ahorizontal y dis- 12o posed armature adapted to be attracted thereby, an indicator Y adapted to occupy either a displa ed or a-concealed position, means carried y. such armature for holdi such indicator` in a concealed Positionen -Ifh Ye-in'thedrairingsfthus `faivdcactuated vby auch operator's ke for scbediindictdfh ubtervnjdndicawr indicator from display to com@ ait u 4; "tc ardvsignal, in combina- 65 ms/'Erba' wie@ rmrrtwmsth t @with new kei le #leemte net and an armature adapted to be attract-ed thereby, an indicator adapted to occupy either a displayed or a concenlcd position, means carried by such zmnature for holding such indicator in u concealed position, means actuated by such operntors ke for movin such indicator from n display@ to a conce ed osition and means carried by the armature or varying the force required to operate such armature.

5. In a switchboard signal, in combination with an operator's key, an electromagnet and an armature adapted to be attracted thereby, an indicator adapted to occupy either s. dislayed or s. concealed sition, means carried by such armature for iolding such indicator in a concealed sit-ion, means actuated by such operators c f for moving such indicator from a displayed to a concealed position and a weight secured to such armature by a bendable arm for varying the force required to operate such. armature.

6. In a snitchboard signal, in combination with en operator's key, a vertically disposed electromagnet and a. horizontally dis sed armature adapted to be attracted there Jy, an indicator adapted to occupy either a dislayed or aconcealed osit-ion, means carried y such armature foriolding such indicator in a concealed position, means actuated by such operators key for moving such indicator from a displayed to u. concealed position and a weight secured to such armature by a bendable arm for varying the force required to operate such armature.

In a telephone switchboard signal, in combination mt h a. ringing and listemng key an electromsgnet and an armature adapted to be attracted thereby, a drop shutter, an indicator carried thereby and adapted t-o oecupy either a displayed or a concealed position, means carried by such shutter for engaging such armature when such indicator is it? a colilieealed posiltilon and nliieanfs operated v suc an( iste e or moving sdch ndlilclhgtlrllrgfrom a displayejd to a. concealed position.

8. In a telephone switchboard s' al, in combination wlth a ringing and listening key an elect-romsgnet and an armature adapted to attracted thereb a drop shutter, an 5 indicator carried there y and adapted to occupy either a displayed or a concealed position, means carried by such shutter for engaging such armature when such indicator is in a concealed posltlon, means o rated by such ringing and listening key or moving such indleator from n. displayed to o concenled position and means carried by the amature for varying the force required to operate such armature.

9. In a telephone switchboard si al, in combination with a ringing and listemng key, "e ,vertically disposed electromanet and a vhorizontally disposed amature a apted to be `ing key when moved to a. listening attracted thereby, a drop shutter, an indicator carried thereby and adapted to occupy either n displayed or a concealed position, means carried by such shutter for engaging such armature when such indicator is m a concealed )osition, menus operated by such ringing and listening key for moving such iudicntor from a d isplaycd to a concealed position and a weight secured to such armature by a bendsble arm t'or varying the force required to operate such arnmture.

10. In a telephone s\\'itchboard signal, in combination Wit h u. ringing and listening key, an electromagnet and an armature adapted to be attracted thereby, a drop shutter, un indicator carried ther-eb) and adapted to oucnpy either a, displayed or a concealed position, means carried by such shutter for engaging such armature when such indicator is u1 a concealed position, a rotect-ing shield for such indicator, such shi d serving to conl ceal such indicator when such shutter is in an engaged position and to disclose such indicator when such shutter is released and means operated by such ringing and listening key for moving such indicator from a displayed to a concealed position.

11. In a telephone switchboard combination with a ringin and hstening key, an electromagnet an an amature adapted to be attracted thereby, a drop shutter, an indicator carried thereb and adapted to occupy either a. displaye or a. concealed position, means carried by such shutter for en such armature when such indicator 1s 1n a concealed position, a protecting shield for such indicator, such shield serving to conceal such indicator when such shutter is in an engaged position and provided with an oplening for disclosing such mdicator when suc shutter is released and means operated by such and listening key when moved to s. listening position for moving such indicator from a. displayed to a concealed position.

12. In a telephone switchboard signal, in combination with a rin and hstening key, an electromsgnet gallti an armature adapted to be attracted thereby, a drop shutter an indicator carried thereby and adapted to occupy either a. displayed or a. concealed position, means carried by such shutter for engaging such amature when such indicator 1s in a concealed position, a protecting shield for such indicator, such shield serving to conceal such indicator when such shutter is in an engaged position and provided with an openin having a. transparent screen therein for iselosing such in dicator when such shutter is released and means operated by such ringing and listenal, in

sition for moving such indicator from a displayed to s concealed position. t

13. In a telephone Yswitnshboard signal, ln

combination with a ringing and listeningi ke)1 and the o crating cam thereof, an electromagnet and) an armature adapted to be attracted thereby, a drop shutter, an indicator carried thereby and adapted to occupy either a displaed or a concealed position, means carried y such shutter for engaging such armature when such indicator is in a concealed position and a lever for communicating motion from the operating cam of suc-l1 ringing and listenin key to such shut-ter for moving such in 'cater from a displayed to a concealed position.

14. In a telephone switchboard signal, in combination wlth a ringing and llstening key and the o rating cam thereof, an electromagnet an an armature adapted to be attracted thereby, a drop shutter, an indicator carried thereby and adapted to occupy either a displa ed or a concealed position, means carried y such shutter for engaging 5 such armature when such indicator 1s 1n a concealed position and a lever pivoted to the frame of such signal for communicating n iiotion from the operating cam of such ringing and listening key lo such shutter for moving such indicator from a displayed to a concealed osition,

15. n a telephone switchboard signal, in combination with a ringing and listening key and the oierating cani thereof, an electroniagnet an an armature adapted to be attracted thereby, a drop shutter, an indicator carried thereby and adapted to occup) either a displayed or a concealed position, means carried by such shutter for engaging such armature when such indicator is in a concealed position and a lever pivoted to the frame of such signal and adapted to coperate at one end with a pin carried bv such cam and at the other end with such shutter ivhereby when such cam is moved to a listen- 111g posltion such lever is operated to move such indicator from a displayed to a concealed position.

OSCAR M. LEICH.

Witnesses:

A.. J. KOEN, E. G. Email. 

